HP Modular Cooling System 200 User Guide Abstract This document is for the person who installs racks and rack products. This procedure is performed only by trained personnel. HP assumes you are qualified in performing installations and trained in recognizing hazards in rack products.
© Copyright 2013, 2014 Hewlett-Packard Development Company, L.P. The information contained herein is subject to change without notice. The only warranties for HP products and services are set forth in the express warranty statements accompanying such products and services. Nothing herein should be construed as constituting an additional warranty. HP shall not be liable for technical or editorial errors or omissions contained herein. Microsoft© and Windows© are U.S.
Contents Overview ..................................................................................................................................... 5 Introduction .............................................................................................................................................. 5 Configuration factors ..................................................................................................................... 7 Optimum environment and site preparation ................
Environmental specifications ........................................................................................................... 58 HP 642 1200mm Rack specifications ........................................................................................................ 58 Replaceable parts and maintenance and service information ........................................................... 59 Obtaining replaceable parts ................................................................................
Overview Introduction The HP Modular Cooling System 200 is an air and water heat exchanger that removes high levels of excess heat generated by equipment installed in HP racks. The installed equipment takes in cold air through the front of the closed MCS-200 and uses the air for internal cooling. After the air has been warmed, the MCS-200 expels the air through the rear vents. HP provides several components to complement or complete your MCS-200.
Item Reference 3 Control valve 4 Flow meter 5 Humidity sensor 6 Rear extension 7 Heat exchanger unit 8 TFT touchscreen display 9 Fan units (4 fans by default, 6 fans maximum) 10 Management module Unit top view NOTE: For easier viewing, the canopies were removed in the previous illustration.
Configuration factors Optimum environment and site preparation CAUTION: Contaminated water might cause decreased cooling capacity or disruption in service. The water flowing into the MCS-200 unit must meet the guidelines stated in the HP Modular Cooling System 200/100 Site Preparation Guide. The MCS-200 warranty does not cover damage caused by contaminated water. IMPORTANT: Before you begin the installation process, review the HP Modular Cooling System 200/100 Site Preparation Guide.
Installation MCS-200 kit contents • MCS-200 unit installed on an HP Rack (1) • Automatic Door Release kit (1) • Rear plate cover (1) • Condensation hose (blue) (1) • Condensation hose (clear)* (1) • Power cord, 4 m (13.1 ft), L6-20 to Walther Procon series A5 connector (2) • Power cord, 4 m (13.1 ft), IEC-309 to Walther Procon series A5 connector (2) • CAT5e cable, 7.
Hardware kit contents If any of the following items are missing or damaged, contact your HP authorized reseller. Item Description Quantity 1 M6 screws 24 2 M6 cage nuts Cage nut tool 24 1 3 T-25 bit socket Allen key 1 1 4 Door/side panel key 2 5 Quarter turn hook and loop strap 10 6 Leveling pads 4 Extra hardware might be included for your convenience.
Installing the MCS-200 WARNING: The MCS-200 unit and rack are shipped together on a heavy duty shock pallet weighing approximately 1600 kg (3600 lb). HP recommends hiring professional movers to move the heavy duty shock pallet, remove the MCS-200 unit and rack from the pallet, and move the MCS-200 unit and rack to the final location. CAUTION: Contaminated water might cause decreased cooling capacity or disruption in service.
6. Plug the network cable into the RJ-45 connector on the transfer switch in the top of MCS-200 unit. 7. Plug the other end of the network cable into your network connection outlet. WARNING: Before you connect the power cords to a power source, be sure that the unit is properly grounded for potential equalization caused by high leakage current. IMPORTANT: Do not connect the power cords into a power supply. 8.
WARNING: To reduce the risk of electric shock or damage to the equipment: • Do not disable the power cord grounding plug. The grounding plug is an important safety feature. • Plug the power cord into a grounded (earthed) electrical outlet that is easily accessible at all times. • Unplug the power cord from the power supply to disconnect power to the equipment. • Do not route the power cord where it can be walked on or pinched by items placed against it.
12. If the rear extension is installed, this step is optional. Using two M6 trilobe flathead screws, secure the two brackets to the MCS-200 unit frame. For more details on how to install the brackets, see the HP Modular Cooling System 200/100 Options Installation Guide. 13. Align the access panel with the two brackets. 14. Using two M6 flathead screws, secure the access panel to the brackets on the MCS-200 unit frame.
WARNING: To reduce the risk of electric shock or damage to the equipment: • Do not disable the power cord grounding plug. The grounding plug is an important safety feature. • Plug the power cord into a grounded (earthed) electrical outlet that is easily accessible at all times. • Unplug the power cord from the power supply to disconnect power to the equipment. • Do not route the power cord where it can be walked on or pinched by items placed against it.
b. In the password field, enter the password. The default password is Admin. The Main Menu screen appears. 9. Enter the product ID and serial number on the 1 Network Configuration line. The product ID and 10-digit serial number are located on a label inside the rear MCS-200 unit door.
a. From the Main Menu screen, select 3 Factory Default. and press Enter. The Default Product Identification screen appears. b. To set the product ID, select 2 Product ID MCS and press Enter. c. To set the serial number, select 3 Serial Number MCS and press Enter. d. To return to the Main Menu screen, press Esc. 10.
a. From the Main Menu screen, select 1 Network Configuration and press Enter. The Menu Network Configuration screen appears.
b. Select 1 IP Configuration and press Enter. The IP Configuration screen appears. c. To disable DHCP, select 4 Enable/Disable DHCP and press Enter. d. Select 1 IP Address, and then enter the new IP address. e. Select 2 IP Subnet mask, and then enter the IP subnet mask. f. 11. Select 3 IP Def. Router, and then enter the gateway.
a. Return to the Main Menu Network Configuration screen. b. Select 4 Activate Actual Values and press Enter. c. 12. To reboot, at the prompt, enter y. You must reboot to activate the IP settings, product ID, and serial number values. Access the Management module through the web interface: a. Launch a supported browser. The browser window appears. b.
c. Click Sign In. 14. Click Setup>Accounts, and then change the default Web Admin and Web User passwords. 15. Click Save Settings. 16. Optional, but HP-recommended: Click Setup>Management>Remote Access, and then select SSL Enable.
17. Optional: Enter an SSL key. 18. Click Save Settings. 19. To set up your trap receivers, click Setup>Management>Trap Receivers. 20. Click Save Settings.
21. Optional, but HP-recommended: To set up your SNMP managers, click Setup>Management>SNMP Managers. 22. Click Save Settings. Configuring the IP address through the web interface 1. View the IP address received from DHCP on the operator display. 2. Access the Management module through the web interface: a. Launch a supported browser. The browser window appears. b.
c. 4. Click Sign In. Click Setup>Network. a. To disable DHCP, click the radio button. The default setting is enabled. Whenever you make a change regarding DHCP, you must restart the server. A new screen will appear prompting you to restart. — To restart the server immediately, select Yes. — To return to the Network screen, select No. b. Click Save Settings. c. In the IP Address field of the management module, change the IP address. d. Change the network mask of the management module. e.
g. Log in to the new IP address. 5. Click Setup>Accounts, and then change the default Web Admin and Web User passwords. 6. Click Save Settings. 7. (Optional, but HP-recommended) Click Setup>Management>Remote Access, select SSL Enable. 8. (Optional) Enter an SSL key. 9. Click Save Settings.
10. To set up your trap receivers, click Setup>Management>Trap Receivers. 11. Click Save Settings. 12. (Optional, but HP-recommended) To set up your SNMP managers, click Setup>Management>SNMP Managers. 13. Click Save Settings. For more information on adjusting the management module settings through the web interface, see the HP Modular Cooling System 200/100 Web Interface User Guide.
1. Route the water hoses from the HP Modular Cooling System Hook Up Kit through the floor cut-out, and then use a hose wrench to install each main hose to the MCS-200 unit. For information on floor cut out dimensions, see the HP Modular Cooling System 200/100 Site Preparation Guide. 2. Route the two drain hoses to the drain collection system catch basin: a. Install and route the blue drain hose into either the water return line or the gravity drain collection system catch basin. b.
b. Enter the password in the Password field. The default password is Admin. c. Click Sign In. 4. Click Setup>Advanced. 5. In the Temperature Control field, select Manual, and then click Save Settings. You can now set the Fan Speed Target and Water Valve fields manually. 6. In the Water Valve field, to open the valve completely, enter 100, and then click Save Settings.
7. Turn on the water by opening the ball valves at the facility water line connections. 8. In the web interface, click the Home tab. 9. To verify that the water source is available and turned on, select the Overview menu, and then verify the Water Flow status.
10. If necessary, remove trapped air from the heat exchanger by opening the bleeder valve on the top rear side of the cooling unit. To verify that the heat exchanger is bleeding correctly, verify that a few drops of condensation pass through the clear tube. 11. After you have verified the flow and removed the air, in the web interface, click Setup>Advanced. 12. In the Temperature Control field, select Automatic, and then click Save Settings. The installation is complete.
Automatic Door Release Kit Automatic Door Release Kit Overview The Automatic Door Release Kit is designed as a safety mechanism in the event that the MCS-200 unit shuts off unexpectedly. If the MCS-200 unit shuts off unexpectedly, the electromagnetic locks on the front door, the rear master door, and the rear slave door are immediately deactivated.
To test the Automatic Door Release feature: 1. At the bottom of the screen, click the Door Opening Test button. A new screen appears. 2. Choose one of the following: o To begin the test and open the rack doors, click OK. o To return to the Advanced screen, click Quit. NOTE: To avoid an increase in relative humidity, after completing the Door Opening test, be sure the doors are closed. To verify that the doors are closed, go to the Home screen.
Management module Management module overview The HP Modular Cooling System has a management module, which can be accessed remotely through the web interface. The management module analyzes, queries, and manages various measurements and warning and alarm messages from the unit. The management module (on page 32) analyzes measurements provided by each sensor or module, generates any necessary warning or alarm messages, and then sends them to the web interface.
• Fan Module—Displays the Server Intake and Server Exhaust Temperature as well as the RPM of each fan • Water Inlet Temperature—Displays the temperature of the water coming into the MCS-200 unit to be used to cool the servers • Water Outlet Temperature—Displays the temperature of the water after removing the server heat • Water Flow—Displays the value of the water flow in liters/gallons per minute Management module components The management module is located on the lower front of the MCS-200 unit, b
Accessing the management module through a terminal emulation program 1. Verify that a serial cable is connected between the management module and a host computer. 2. Launch a terminal emulation program such as HyperTerminal ("Configuring HyperTerminal" on page 43) or Minicom. For information about configuring the management module, see the HP Modular Cooling System Web Interface User Guide. 3.
2. In the Address field (Microsoft® Internet Explorer) or the Location field (Mozilla), enter one of the following: http://hostname[:port number] -or- https://hostname[:port number] (if SSL is enabled) where hostname is the IP address of the management module and port number is the port number if using a port other than the default 80 for http and 443 for https. The login screen appears. 3. Log in through the web browser ("Logging in through the web interface" on page 35).
For instructions on changing the password, see the HP Modular Cooling System Web Interface User Guide. Only one Admin session and one User session are supported at a time. If a second session is initiated (after successful login) or a console session timeout occurs, sessions can be terminated. In both situations, the existing session is terminated and the login screen appears. Admin session logins, logouts, and terminations are recorded in the Event Log menu.
Connecting an alarm device to the management module alarm relay An alarm device can be connected to the management module alarm relay through the RJ-12 connector. You can enable or disable the alarm relay for specific alarms and warnings through the web interface. 24 V DC up to 100 mA is available directly from the management module or the alarm relay can switch up to 30 V at 1 A. For more information, see the HP Modular Cooling System 200/100 Web Interface User Guide.
Serial interface HP Modular Cooling System Utility overview The HP Modular Cooling System Configuration Utility is used for entering network settings, accessing controls, reviewing the details on the info page, and resetting to factory defaults. First, log in to a terminal emulation program. ("Logging in through the terminal emulation program" on page 34) After you have successfully initiated a terminal emulation session, the HP Modular Cooling System Configuration Utility appears.
Option number Submenu Description 1 Network Configuration Enter or change network properties for the management module. 2 Info Page View parameters for the management module. 3 Factory Default Change parameters back to default settings. Menu Network Configuration submenu Option number Submenu Description 1 IP Configuration Enter or change the IP configuration for the management module. 2 Change Passwords Enter or change the passwords for the management module.
IP Configuration submenu Option number Submenu Description 1 IP Address Enter or change the IP address for the management module. 2 IP Subnet mask Enter or change the subnet mask for the management module. 3 IP Def. Router Enter or change the default router for the management module. 4 Enable/Disable DHCP Select to enable or disable DHCP.
Change Passwords submenu Option number Submenu Description 1 Console Password 'Admin' Change the Admin password. 2 FTP Password 'ftpuser' Change the FTP user password. 3 FTP Password 'ftpadmin' Change the FTP Admin password. 4 HTTP Password 'User' Change the HTTP user password. 5 HTTP Password 'Admin' Change the HTTP Admin password.
Info page The Info page displays the following parameters: • IP Address • Subnetmask • Router/Gateway • MAC Address • SysName • SysContact • SysLocation • Software Version • Hardware Version • Firmware • Serial Number • Manufacture Date • CMC-Info Serial interface 42
Factory Default submenu Option number Submenu Description 1 Set to Factory Default Set the management module to factory default. 2 Product ID MCS Set the MCS unit product ID. 3 Serial Number MCS Set the MCS unit serial number. Configuring HyperTerminal 1. From the Microsoft® Windows® desktop menu, click Start>All Programs>Accessories>Communication>HyperTerminal. The Connection Description window appears. 2. Enter a description and select an icon for the connection.
5. When a connection is established, press Enter and then log in. The Main menu for the management module appears. Follow the onscreen options to configure the management module. Configuring Minicom NOTE: The following example uses Red Hat Linux 3.0. For more information, refer to your Linux operating system Help or documentation. IMPORTANT: Minicom is a utility that is loaded during the installation of Linux.
Operator display Operator display overview The operator display provides information on the system operation, viewable on the outside of the MCS-200 front door. When the management module issues an alarm or warning, the warning and alarm messages display ("Warning and alarm messages" on page 45) on the operator display, as well as on the web interface Alarms menu and Alarm History menu. Operator display components The operator display on the front door of the MCS-200 unit has a digital touch-screen.
Indicators Meaning Type of message Warning Solution: 1. Remove the fan unit. 2. Reinstall the same fan unit. If the warning message does not clear after the module is reseated, replace the fan unit with a CSR part. For more information on CSR parts, see "Replaceable parts and maintenance and service information (on page 59)." HEX (heat exchanger unit) temperature in failed (Server Intake Temperature failed) Indicators Meaning Operator display alarm message HEX1, HEX2, or HEX3 Temp.
Solution: Verify the water supply. Water temperature input is out of range Indicators Meaning Operator display alarm message Water Temp. In Failed Web interface alarm message Water Unit Temperature Input Out of Range Condition Water temperature sensor is not working properly (possible open circuit). Sensors Water group sensor SNMP notification Warning Type of message Warning Solution: 1. Verify the water supply. 2.
1. Verify the water supply. 2. Contact HP, or see the HP website (http://www.hp.com). Water flow valve is closed Indicators Meaning Operator display alarm message Water Valve? Web interface alarm message Water Valve Failed Condition Water flow valve is closed, and water flow is detected. Modules Water group SNMP notification Warning Type of message Warning Solution: 1. Verify the water valve is closed. 2. Contact HP, or see the HP website (http://www.hp.com).
Indicators Meaning Operator display alarm message Temperature too high Web interface alarm message Temperature too high Condition Heat overload condition Modules or sensors The average server air temperature is above the temperature assigned in the web interface Intake Temp tab High Temperature Threshold field. SNMP notification Critical Type of message Alarm Solution: 1. Verify the water inlet temperature. 2. Verify that the flow matches the specifications required for heat load. 3.
Temperature below threshold (Low Temperature Threshold field) Indicators Meaning Operator display alarm message Temperature too low Web interface alarm message Temperature too low Condition The average server air temperature is lower than the temperature assigned in the web interface Intake Temp tab Low Temperature Threshold field. Sensors Air temperature sensor SNMP notification Warning Type of message Warning Solution: 1. Verify water flow matches specifications required for heat load. 2.
Indicators Meaning SNMP notification Critical Type of message Alarm Solution: 1. Verify the water supply and that the MCS-200 unit is receiving water. 2. Verify that the water pressure delta is accurate. 3. Verify that the water flow loss emergency door opening temperature threshold is not less than 5°C (41°F) above or more than 20°C (68°F) above the Server Intake Temperature Set Point. 4.
Indicators Meaning Condition The water level has exceeded the permissible level of the condensation pump sensor. Modules or sensors Condensation pump sensor SNMP notification Warning Type of message Warning Solution: 1. To determine the cause, look for leaks or condensation. 2. If no leaks are found, adjust the temperature in the Excessive Moisture: Condensation Pump Cycles Warning Threshold field. IMPORTANT: Use caution when entering temperatures in the Condensation Pump Threshold fields.
NOTE: To clear the condensation pump cycles warning, click Cooling System in the left navigation frame to access the Cooling System screen, and then click the Alarms/Warnings tab. Under the Warnings section, set Alarm Reset to Manual and click Save Settings. Then, return to the General menu and click Clear Alarms. This step only clears the warning when the condensation pump is not running. Both doors are open Indicators Meaning Operator display alarm Both front and rear rack doors are open.
Frequently asked questions MCS-200 frequently asked questions Question Answer What cooling capacity ranges are available in the MCS-200 unit? The cooling capacity of the heat exchanger unit depends on the water supply temperature and the server inlet set point. The MCS-200 unit is capable of cooling rack-mounted components consuming up to 50 kW of electrical power.
Question Answer Why do I get an extra line feed sent from Microsoft® Windows® when I access the serial interface using an HP serial console switch? Enter these commands while logged in as Admin on the HP serial console switch console port (where port x is the port connected to the MCS management module): port x set out lf=strip port x set flow=Xonxof Is water prevented from entering the Yes, the MCS-200 unit is physically separate from the server enclosure.
Troubleshooting MCS-200 troubleshooting Issue Resolution The water flow is low or not flowing. For more information, see the "Temperature Control settings" section in the HP Modular Cooling System 200/100 Web Interface User Guide located on the Documentation CD included with this product. The fan speed is too low.
Specifications MCS-200 specifications Item Specification Voltage 230 VAC +/- 10%, 50 Hz and 277 VAC +/- 10%, 60 Hz Maximum height (including the rack) 200.7 cm (79 in) Maximum width (including the rack) 90.4 cm (35.6 in) maximum Maximum depth (including the rack and rack handle) 151 cm (59.5 in) (Depth includes rear extension) Maximum shipping height (on skid) 228.5 cm (90.0 in) Maximum shipping width (on skid) 122.0 cm (48.0 in) Maximum shipping depth (on skid) 182.9 cm (72.
Thermal and air flow performance Maximum thermal and air flow performance parameters Single rack Dual rack (Specification per rack) Air temperature—Inlet to rack-mounted 25ºC (68ºF) components 7º–18°C (45º–64°F) Chilled water temperature 25ºC (68ºF) 7º–18°C (45º–64°F) Total rack-mounted component air flow 4,500 cfm (7,650 m3/h) or less at 2,400 cfm (4,050 m3/h) or less at 0 or more pressure drop across the 0 or more pressure drop across the rack mounted components rack mounted components Chilled water
Replaceable parts and maintenance and service information Obtaining replaceable parts For more information on replaceable parts, see the HP Modular Cooling System Maintenance and Service Guide. 1. Go to the HP website (http://www.hp.com/support). 2. From the left menu bar, select Support and Troubleshooting Information. 3. In the product field, enter HP Modular Cooling System, and click Enter. 4. From the Resources section, select Manuals. 5.
Water quality and leveling requirements, and condensation management Water quality requirements and specifications Closed-loop water must not contain any lime scale deposits or loose debris. The water must have a low level of hardness, particularly a low level of carbon hardness. Filters must be used to remove free floating particulates and be regularly maintained. Additionally, the water must not be so soft that it attacks the materials with which it comes into contact.
Parameter Range Hardness (CaCO3), total <200 ppm Iron (Fe), total <3.0 ppm Manganese (Mn), total <0.1 ppm Bacteria <1000 CFUs/ml Residue on evaporation <500 ppm Turbidity 20 Corrosion inhibitor Recommended CAUTION: Contaminated water might cause decreased cooling capacity or disruption in service. The water flowing into the MCS-200 unit must meet the guidelines stated in the HP Modular Cooling System Site Preparation Guide.
• Non-stainless steel Iron components Leveling requirements Adjust the MCS leveling feet so that the unit is level. For more information about seismic area considerations, refer to the HP Modular Cooling System Site Preparation Guide on the HP website (http://h20000.www2.hp.com/bizsupport/TechSupport/DocumentIndex.jsp?contentType=SupportManu al&lang=en&cc=us&docIndexId=64179&taskId=101&prodTypeId=3447589&prodSeriesId=3657806).
Support and other resources Before you contact HP Be sure to have the following information available before you call HP: • Active Health System log (HP ProLiant Gen8 or later products) Download and have available an Active Health System log for 3 days before the failure was detected. For more information, see the HP iLO 4 User Guide or HP Intelligent Provisioning User Guide on the HP website (http://www.hp.com/go/ilo/docs).
providers or service partners) identifies that the repair can be accomplished by the use of a CSR part, HP will ship that part directly to you for replacement. There are two categories of CSR parts: • Mandatory—Parts for which customer self repair is mandatory. If you request HP to replace these parts, you will be charged for the travel and labor costs of this service. • Optional—Parts for which customer self repair is optional. These parts are also designed for customer self repair.
Pour plus d'informations sur le programme CSR de HP, contactez votre Mainteneur Agrée local. Pour plus d'informations sur ce programme en Amérique du Nord, consultez le site Web HP (http://www.hp.com/go/selfrepair). Riparazione da parte del cliente Per abbreviare i tempi di riparazione e garantire una maggiore flessibilità nella sostituzione di parti difettose, i prodotti HP sono realizzati con numerosi componenti che possono essere riparati direttamente dal cliente (CSR, Customer Self Repair).
HINWEIS: Einige Teile sind nicht für Customer Self Repair ausgelegt. Um den Garantieanspruch des Kunden zu erfüllen, muss das Teil von einem HP Servicepartner ersetzt werden. Im illustrierten Teilekatalog sind diese Teile mit „No“ bzw. „Nein“ gekennzeichnet. CSR-Teile werden abhängig von der Verfügbarkeit und vom Lieferziel am folgenden Geschäftstag geliefert. Für bestimmte Standorte ist eine Lieferung am selben Tag oder innerhalb von vier Stunden gegen einen Aufpreis verfügbar.
sustituciones que lleve a cabo el cliente, HP se hará cargo de todos los gastos de envío y devolución de componentes y escogerá la empresa de transporte que se utilice para dicho servicio. Para obtener más información acerca del programa de Reparaciones del propio cliente de HP, póngase en contacto con su proveedor de servicios local. Si está interesado en el programa para Norteamérica, visite la página web de HP siguiente (http://www.hp.com/go/selfrepair).
Opcional – Peças cujo reparo feito pelo cliente é opcional. Essas peças também são projetadas para o reparo feito pelo cliente. No entanto, se desejar que a HP as substitua, pode haver ou não a cobrança de taxa adicional, dependendo do tipo de serviço de garantia destinado ao produto. OBSERVAÇÃO: Algumas peças da HP não são projetadas para o reparo feito pelo cliente. A fim de cumprir a garantia do cliente, a HP exige que um técnico autorizado substitua a peça.
Support and other resources 69
Support and other resources 70
Regulatory compliance notices Safety and regulatory compliance For safety, environmental, and regulatory information, see Safety and Compliance Information for Server, Storage, Power, Networking, and Rack Products, available at the HP website (http://www.hp.com/support/Safety-Compliance-EnterpriseProducts).
Acronyms and abbreviations CSR Customer Self Repair DHCP Dynamic Host Configuration Protocol MCS modular cooling system SSL Secure Sockets Layer Acronyms and abbreviations 72
Documentation feedback HP is committed to providing documentation that meets your needs. To help us improve the documentation, send any errors, suggestions, or comments to Documentation Feedback (mailto:docsfeedback@hp.com). Include the document title and part number, version number, or the URL when submitting your feedback.
Index A I accessing the management module 34 alarm relay 37 Alarms and warnings 45 authorized reseller 63 Automatic Door Release Kit 30 Info & Updates menu 42 installation instructions 8, 10 installation, management card 8 introduction 5 IP addresses, setting up 40 B K Both doors are open warning 45 kit contents 8, 9 C L condensation management 62 condensation pump 5 configuration 8, 13, 25 configuration factors 7 configuration utilities 38 configuring HyperTerminal 43 configuring Minicom 44 custo
S safety information 7, 71 serial interface 38 service information 59 site preparation 7 spares 59 specifications 57, 58 specifications, environmental 57 support 63 T technical support 63 telephone numbers 63 Temperature above threshold (Warning Temperature Threshold field) 45 Temperature below threshold (Low Temperature Threshold field) 45 terminal emulator session 34 thermal air flow performance 58 troubleshooting 56 U Uneven heat load 45 W Warning and alarm messages 45 water connections 25 Water flow
